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- Battery PercentageFind remaining charge as a percentage of full capacity.
- Battery RuntimeEstimate how long a battery lasts at a given power draw.
- Battery Charging TimeCalculate how long it takes to charge a battery at a given current.
- Battery EnergyCalculate battery energy in watt-hours from amp-hours and voltage.
- Battery EfficiencyCalculate round-trip efficiency from energy out and energy in.
- Battery Series & ParallelCalculate pack voltage, amp-hours, and watt-hours from series/parallel cell layout.
- Battery C-RateFind discharge C-rate and runtime from capacity and load current—updates live.
- Inverter LossConvert DC input watts to AC output and show power lost as heat in the inverter.
- Inverter Peak Load & SurgeSum motor running watts and staggered surge demand—get continuous load, peak W, and a recommended pure-sine inverter tier.
- Inverter Loading CurveEstimate overload shutdown time from nominal power, current load, ambient temperature, and manufacturer overload curves.
- Home Backup Battery SizingSize a backup battery bank for essential loads, runtime, voltage, and depth of discharge.
- Battery Voltage DropEstimate DC wire voltage drop and voltage at the load from amps, length, and system voltage.